公开(公告)号：US20140046501A1

公开(公告)日：2014-02-13

申请号：US13965332

申请日：2013-08-13

Applicant: Tsinghua University

Inventor： Hongbin Sun ,  Qinglai Guo ,  Mingye Zhang ,  Boming Zhang ,  Wenchuan Wu ,  Bin Wang

IPC: G05B11/01

CPC classification number: G05B11/01 ,  G06F2217/78 ,  H02J3/16 ,  H02J2003/007 ,  Y02E40/34

Abstract: A security and economy coordinated automatic voltage control method based on a cooperative game theory is provided. The method includes: establishing a multi-objective reactive voltage optimizing model of a power system; resolving the multi-objective reactive voltage optimizing model into an economy model and a security model; solving the economy model and the security model based on the cooperative game theory to obtain the automatic voltage control instruction; and performing an automatic voltage control for the power system according to the automatic voltage control instruction.

Abstract translation: 提供了一种基于合作博弈理论的安全经济协调自动电压控制方法。 该方法包括：建立电力系统的多目标无功电压优化模型; 将多目标无功电压优化模型解决为经济模型和安全模型; 基于合作博弈理论解决经济模型和安全模型，获得自动电压控制指令; 并根据自动电压控制指令对电力系统进行自动电压控制。

公开(公告)号：US12124978B2

公开(公告)日：2024-10-22

申请号：US17555498

申请日：2021-12-19

Applicant: Tsinghua University

Inventor： Wenchuan Wu ,  Boming Zhang ,  Zihao Li ,  Hongbin Sun ,  Bin Wang ,  Qinglai Guo

IPC: G06Q10/04 ,  G05B19/042 ,  G06Q50/06 ,  H02J3/00

CPC classification number: G06Q10/04 ,  G05B19/042 ,  G06Q50/06 ,  H02J3/0012 ,  G05B2219/2639 ,  H02J2203/20

Abstract: The present disclosure provides a method for optimizing transformation of automation equipment in a power distribution network based on reliability, including determining installation states of respective components in the power distribution network and operation criterions for fault isolation, load transfer and fault recovery after a fault occurred in a feeder segment; determining a target function which is a target function for minimizing a total transformation cost of the power distribution network; determining constraint conditions including reliability constraints; establishing an optimization model for evaluating the reliability of the power distribution network based on the reliability constraints in accordance with the target function and the constraints; and solving the established optimization model for evaluating the reliability of the power distribution network based on the reliability constraints to obtain optimal solutions as optimization results of the automation transformation state of the circuit breaker and the switch and the reliability index.

公开(公告)号：US11689024B2

公开(公告)日：2023-06-27

申请号：US17383658

申请日：2021-07-23

Applicant: Tsinghua University

Inventor： Wenchuan Wu ,  Shuwei Xu ,  Boming Zhang ,  Hongbin Sun ,  Bin Wang ,  Qinglai Guo

IPC: H02J3/38 ,  G05B19/042

CPC classification number: H02J3/381 ,  G05B19/042 ,  G05B2219/2639 ,  H02J2203/20 ,  H02J2300/28

Abstract: The disclosure relates to a two-side stochastic dispatching method for a power grid. By analyzing historical data of wind power, the Gaussian mixture distribution is fitted by software. For certain power system parameters, a two-side chance-constrained stochastic dispatching model is established. The hyperbolic tangent function is used to analyze and approximate cumulative distribution functions of random variables in the reserve demand constraint and the power flow constraint, to convert the two-side chance constraint into a deterministic constraint. The disclosure can have the advantage of using the hyperbolic tangent function to convert the two-side chance constraint containing risk levels and random variables into the solvable deterministic convex constraint, effectively improving the solution efficiency of the model, and providing decision makers with a more reasonable dispatching basis.

公开(公告)号：US10222815B2

公开(公告)日：2019-03-05

申请号：US15331876

申请日：2016-10-23

Applicant: Tsinghua University

Inventor： Wenchuan Wu ,  Boming Zhang ,  Hongbin Sun ,  Weiye Zheng ,  Qinglai Guo ,  Bin Wang

IPC: G06F17/50 ,  G05F1/66 ,  G05B23/02 ,  G06F17/11

Abstract: A method and a device for estimating a state of a power system are provided. The method includes: dividing the power system into a plurality of sub-systems; establishing a first linear model of the power system for a first stage; solving the first linear model by an alternating direction multiplier method to obtain the intermediate state variables of each sub-system; performing a nonlinear transformation at a second stage on the intermediate state variables to obtain intermediate measured values; establishing a second linear model of the power system for a third stage according to the intermediate measured values; and solving the third linear model by the alternating direction multiplier method to obtain the final state variables of each sub-system.

公开(公告)号：US10218176B2

公开(公告)日：2019-02-26

申请号：US15009770

申请日：2016-01-28

Applicant: Tsinghua University ,  ELECTRIC POWER RESEARCH INSTITUTE OF GUANGDONG POWER GRID CO., LTD.

Inventor： Qinglai Guo ,  Hongbin Sun ,  Boming Zhang ,  Wenchuan Wu ,  Huaichang Ge ,  Mingye Zhang ,  Yongwang Zhang ,  Wei Zhao ,  Guoying Lin

IPC: H02J4/00 ,  H02J3/14 ,  B60L11/18

Abstract: A method and a device for controlling a local voltage are provided. The method includes: obtaining a first voltage value of a high-voltage side bus in a local transformer substation; determining a control strategy according to a starting threshold value for a voltage enhancement control, a starting threshold value for an under-voltage load shedding and the first voltage value of the high-voltage side bus; and performing the control strategy to control a charging power of an electric vehicle charging station corresponding to the local transformer substation, so as to control the local voltage of the local transformer substation.

公开(公告)号：US09625929B2

公开(公告)日：2017-04-18

申请号：US14292022

申请日：2014-05-30

Applicant: Tsinghua University ,  Guizhou Power Grid Information & Telecommunication Co., Ltd.

Inventor： Wenchuan Wu ,  Boming Zhang ,  Qing Zou ,  Hongbin Sun ,  Fei Li ,  Qinglai Guo ,  Yi Liu ,  Yajing Gao ,  Hongjia Miao ,  Yuan Ji

IPC: G06F7/32 ,  G05F1/66 ,  G01R19/25 ,  G01R27/02 ,  G01R31/02

CPC classification number: G05F1/66 ,  G01R19/2513 ,  G01R27/02 ,  G01R31/027

Abstract: A method for obtaining a three-phase power flow of a power distribution network and a device for obtaining a three-phase power flow of a power distribution network are provided. The method includes steps of: selecting a three-phase power transformer in the power distribution network and configuring a secondary side of the three-phase power transformer with an ungrounded neutral connection, such that the three-phase power transformer satisfies a preset voltage-current relationship; adding a constraint condition to the preset voltage-current relationship to correct a three-phase admittance matrix of the three-phase power transformer; and applying the three-phase admittance matrix to a preset algorithm to obtain a three-phase power flow of the power distribution network.

公开(公告)号：US09573477B2

公开(公告)日：2017-02-21

申请号：US14461339

申请日：2014-08-15

Applicant: Tsinghua University

Inventor： Hongbin Sun ,  Qinglai Guo ,  Boming Zhang ,  Wenchuan Wu ,  Zhengshuo Li ,  Shujun Xin

IPC: H02J7/00 ,  B60L11/18

CPC classification number: B60L11/1816 ,  B60L11/1844 ,  B60L11/1846 ,  B60L11/1861 ,  B60L2240/80 ,  B60L2250/14 ,  B60L2260/50 ,  Y02E60/721 ,  Y02T10/7005 ,  Y02T10/7044 ,  Y02T10/705 ,  Y02T10/7072 ,  Y02T90/121 ,  Y02T90/128 ,  Y02T90/14 ,  Y02T90/163 ,  Y02T90/169 ,  Y04S10/126 ,  Y04S30/14

Abstract: A method and a device for charging an electric vehicle in a power system are provided. The method includes: obtaining a plurality of electric vehicles connected to the power system at a dispatching time, and obtaining a rated charging power and a charging requirement at the dispatching time; determining a charging period corresponding to the plurality of electric vehicles; determining a forecast period, and obtaining a charging requirement, a remaining charging energy capacity and a maximum charging power; establishing a charging model of the plurality of electric vehicles, establishing a first constraint of the charging model, and establishing a second constraint of the charging model; and solving the charging model under the first constraint and the second constraint to obtain an optimal charging power of each electric vehicle at each charging time in the charging period so as to charge each electric vehicle under the optimal charging power.

Abstract translation: 提供了一种用于为电力系统中的电动车辆充电的方法和装置。 该方法包括：在调度时间内获得连接到电力系统的多个电动车辆，并在调度时获得额定充电电力和充电要求; 确定对应于所述多个电动车辆的充电时段; 确定预测期间，获得充电要求，剩余充电能量容量和最大充电功率; 建立多个电动车辆的充电模型，建立充电模型的第一约束，建立充电模型的第二约束; 并且在第一约束和第二约束条件下解决计费模型，以在充电期间的每个充电时间获得每个电动车辆的最佳充电功率，以便以最佳充电功率对每个电动车充电。

公开(公告)号：US20150088470A1

公开(公告)日：2015-03-26

申请号：US14143474

申请日：2013-12-30

Applicant: Tsinghua University

Inventor： Wenchuan Wu ,  Boming Zhang ,  Hongbin Sun ,  Zhigang Li ,  Qinglai Guo

IPC: G06F17/50

CPC classification number: G06Q50/06 ,  G06F17/11

Abstract: A method and a device for identifying a feasibility of a transmission interface constraint in an online rolling dispatching are provided. The method comprises: S1, establishing an online rolling dispatching model including a transmission interface constraint; S2, establishing a Lagrangian relaxation dual problem of the online rolling dispatching model; and S3, identifying a feasibility of the transmission interface constraint by solving the Lagrangian relaxation dual proble

Abstract translation: 提供了一种用于在线滚动调度中识别传输接口约束的可行性的方法和装置。 该方法包括：S1，建立包含传输接口约束的在线滚动调度模型; S2，建立了在线滚动调度模型的拉格朗日松弛双重问题; 和S3，通过解决拉格朗日松弛双重问题来识别传输接口约束的可行性

公开(公告)号：US20140172298A1

公开(公告)日：2014-06-19

申请号：US14109431

申请日：2013-12-17

Applicant: Tsinghua University

Inventor： Qinglai Guo ,  Hongbin Sun ,  Boming Zhang ,  Wenchuan Wu ,  Shujun Xin ,  Zhengshuo Li

IPC: G01C21/34

CPC classification number: G01C21/3469 ,  B60L11/1824 ,  B60L11/1838 ,  B60L11/1861 ,  B60L2240/622 ,  B60L2240/68 ,  B60L2240/70 ,  B60L2240/72 ,  B60L2240/80 ,  B60L2260/52 ,  B60L2260/54 ,  Y02T10/7005 ,  Y02T10/7044 ,  Y02T10/705 ,  Y02T10/7072 ,  Y02T10/7291 ,  Y02T90/121 ,  Y02T90/128 ,  Y02T90/14 ,  Y02T90/16 ,  Y02T90/161 ,  Y02T90/162 ,  Y02T90/163

Abstract: A method and a device for navigating an electric vehicle in charging are provided. The method comprises: S1, obtaining a navigation area, wherein the navigation area comprises a plurality of charging stations; S2, receiving a charging request from an electric vehicle in the navigation area; S3, obtaining a plurality of first time periods according to the electric vehicle and the plurality of charging stations; S4, selecting a minimum first time period from the plurality of first time periods; and S5, navigating the electric vehicle to a charging station corresponding to the minimum first time period.

Abstract translation: 提供了一种用于在充电中导航电动车辆的方法和装置。 该方法包括：S1，获得导航区域，其中导航区域包括多个充电站; S2，在导航区域中接收来自电动车辆的收费请求; S3，根据电动车辆和多个充电站获得多个第一时间段; S4，从多个第一时间段中选择最小的第一时间段; 和S5，将电动车辆导航到对应于最小第一时间段的充电站。

公开(公告)号：US12015271B2

公开(公告)日：2024-06-18

申请号：US17500539

申请日：2021-10-13

Applicant: Tsinghua University

Inventor： Wenchuan Wu ,  Boming Zhang ,  Zihao Li ,  Hongbin Sun ,  Bin Wang ,  Qinglai Guo

IPC: H02J3/00 ,  G05B17/02 ,  G06F17/12

CPC classification number: H02J3/001 ,  G05B17/02 ,  G06F17/12 ,  H02J2203/20

Abstract: The disclosure provides power distribution network reliability index calculation method based on mixed integer linear programming. The method includes: establishing a model for optimizing reliability indexes of a power distribution network based on a mixed integer linear programming model, wherein the model comprises an objective function and constraint conditions, the objective function is for minimizing a system average interruption duration index (SAIDI); solving the model based on the objective function and the constraint conditions to obtain reliability indexes of the power distribution network; and controlling operation of the power distribution network based on the reliability indexes.